Coaxial cable service interrupter

Details Coaxial cable service interrupter Coaxial cable service interrupter

1995-09-18

1997-03-25

Peng, John K.

Television

Special applications

Manufacturing

348 55, 455 61, H04N 716

Patent

active

056149395

ABSTRACT:
Disclosed is a circuit and system for preventing tampering with services provided in a broadband transmission network. A coaxial relay is coupled between a cable providing signals in the network and the drop cable to the customer's premises. The coil which operates the relay is coupled to the shield conductor of the drop cable and to a source of dc potential. As long as a current flows through the shield portion and the coil, the customer is connected to the network through the relay. If current stops, as when the customer disconnects the drop cable, the customer is disconnected from the network.

REFERENCES:
patent: 4443815 (1984-04-01), Hempell
patent: 4543606 (1985-09-01), Schaer
patent: 4577221 (1986-03-01), Skinner, Sr. et al.
patent: 4776010 (1988-10-01), Noda et al.
patent: 5243647 (1993-09-01), Parikh et al.
patent: 5331412 (1994-07-01), Farmer et al.

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